: ... Pressing CTRL + ALT + Z (literally just holding down one more button) is
: how you continue undoing... It's better because you can use CTRL + Z to
: see differences between a change and the end result. This is extremely
: useful for PS's main purpose (the 'shopping of photos), but as I'm
: currently working on something art-related, I'm finding it an invaluable
: feature.

This Tutorial is for those that want to be able to use the same hotkey setup found in almost all other programs. For me personally, I find it faster and easier then having to include my thumb as well for such a simple and often used task. Especially since I tend to accidentally press the Windows key with the default setup. Plus I have no problem controlling my Undoing. And if I do, I still have the option to use the CTRL + ALT + Z setup if I wish. A good number of the artist in the videos I've seen have complained about the default setup. So I'm sharing my solution to it. But to each his/her own. ;)

: One you'll rarely use is CTRL + Shift + Z, which actually goes forward from
: any previous undo. Nifty to use when you pressed Undo too many times by
: accident.

That it is.